manifest envsubst

[so-jelly]

What this PR does / why we need it:

This PR replaces variable references in manifests with environment variables. It also adds the generated pet name to the environment so that it can be templated as well.

Fixes # #203

[kensipe]

I'll take a deeper look later today... however I would move out of test/utils. It was there prior to my getting involved but have always disliked it. We don't use "utils" in Go generally. the package name provides meaning and context to the use of a func or struct. Could we please consider moving it to a more meaningful package?

We are not going to introduce a need copyright into our code base tho... so translate.go needs to change to a deps or be written.

[kensipe]

Thanks for the contribution... We need a sign-off on the DCO to move forward

[gberche-orange]

thanks @so-jelly for this contrib! It would very much helm me with asserting cluster-wide resources dynamically instanciated by a kuttl and referencing the associated $NAMESPACE.

Any chance for you to proceed with the DCO signature so that this feature can be merged,, such as running git rebase --signoff HEAD~2 ?

[haarchri]

@so-jelly can you rebase and add DCO - happy to see this change comes in ;)

[so-jelly]

I refactored to remove that licensed code. Some edge cases i considered is variables in GVK and keys. I have thought through this a bit and I think it is sound. I can add some test cases as well.

[so-jelly]

I created test cases for some additional field entries. I am not sure what is up with Github review requests. tagging @kensipe in case the review request isn't sufficient.

[jaypipes]

We need this basically yesterday :) Any chance we can see this merged?

[kensipe]

@jaypipes I can provide details elsewhere... I'm just seeing this. looks urgent and apologies for being out of pocket... for way too long. I will review today/night and respond and/or merge